Protection mechanism failure in vm2 - CVE-2026-47686
Published: August 15, 2026
Vulnerability identifier: #VU142651
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-47686
CWE-ID: CWE-693
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to execute arbitrary code on the host system.
The vulnerability exists due to protection mechanism failure in the handleException function in lib/setup-sandbox.js when handling host-thrown errors with an unsanitized Error.cause property. A remote user can access a host object reference through the error cause and invoke host functionality to execute arbitrary code on the host system.
Exploitation requires that an embedder-exposed function throws an Error whose cause references a powerful host object.
Affected software
vm2
How to mitigate CVE-2026-47686
Install security update from vendor's website.
vm2 - update to 3.11.6